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GlossaryMechanical Strength

ability to resist breaking or deforming under force

Mechanical strength refers to the ability of a material to withstand forces or loads without breaking or deforming. In the context of hair, it indicates how well hair fibers can resist damage from physical actions like brushing, pulling, or styling. For professionals, it encompasses properties such as tensile strength, elasticity, and resilience, which are critical for understanding hair health and the effectiveness of hair care products.

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Protection and Restoration of Damaged Hair via a Polyphenol Complex by Promoting Mechanical Strength, Antistatic, and Ultraviolet Protection Properties

research Protection and Restoration of Damaged Hair via a Polyphenol Complex by Promoting Mechanical Strength, Antistatic, and Ultraviolet Protection Properties

1 citations , July 2023 in “Biomimetics”

A new hair treatment using a natural polyphenol complex improves hair strength, reduces static, and protects against UV damage.

research Trichohyalin Mechanically Strengthens the Hair Follicle

108 citations , October 2003 in “Journal of biological chemistry/The Journal of biological chemistry”

Trichohyalin makes hair follicles stronger.

research Understanding Curly Hair Mechanics: Fiber Strength

8 citations , July 2019 in “The journal of investigative dermatology/Journal of investigative dermatology”

Curly hair is mechanically different from straight hair and may need new testing methods.

research Bidirectional binding property of high glycine–tyrosine keratin-associated protein contributes to the mechanical strength and shape of hair

46 citations , June 2013 in “Journal of structural biology”

High glycine–tyrosine keratin-associated proteins help make hair strong and maintain its shape.

research Chaotrope-Guided Protein Microneedles with High Drug-Loading Capacity, Ultrafast Dissolution, and High Mechanical Strength

January 2025 in “SSRN Electronic Journal”

Systems Approach to Human Hair Fibers: Interdependence Between Physical, Mechanical, Biochemical, and Geometric Properties of Natural Healthy Hair

research Systems Approach to Human Hair Fibers: Interdependence Between Physical, Mechanical, Biochemical and Geometric Properties of Natural Healthy Hair

11 citations , February 2019 in “Frontiers in Physiology”

Hair properties are interconnected; a comprehensive, cross-disciplinary approach is essential for understanding hair behavior.

research Physical and mechanical properties of the hair shaft: A review of measurement techniques to verify the efficacy of cosmetic products

January 2024 in “Seven Editora eBooks”

Different techniques measure hair properties to ensure cosmetic products work.

research Quantifying the effects of repeated dyeing: morphological, mechanical, and chemical changes in human hair fibers

September 2024 in “Heliyon”

Repeated hair dyeing significantly damages hair.

research Discovery of a sol–gel reinforcing the strength of hair structure: mechanisms of action and macroscopic effects on the hair

2 citations , February 2016 in “Journal of sol-gel science and technology”

A small molecule can strengthen fine hair, making it more resistant and natural-feeling.

research Effect of Temperature and Humidity on Mechanical Properties of Rabbit Hair Fibers

October 2012 in “Advanced Materials Research”

Higher temperatures improve rabbit hair strength up to 50°C, but moisture weakens it.

research Fabrication of Bilayer Nanofibrous-Hydrogel Scaffold from Bacterial Cellulose, PVA, and Gelatin as Advanced Dressing for Wound Healing and Soft Tissue Engineering

78 citations , February 2024 in “ACS Omega”

The scaffold is a promising material for wound healing and tissue engineering.

research Transglutaminase-3 Enzyme: A Putative Actor in Human Hair Shaft Scaffolding?

30 citations , August 2008 in “The journal of investigative dermatology/Journal of investigative dermatology”

TGase 3 helps build hair structure by forming strong bonds between proteins.

research Fabrication of Bio-Based Gelatin Sponge for Potential Use as A Functional Acellular Skin Substitute

28 citations , November 2020 in “Polymers”

Crosslinked gelatin sponges show promise as skin substitutes for wound treatment.

research Novel tip-loaded dissolving and implantable microneedle array patches for sustained release of finasteride

23 citations , July 2021 in “International Journal of Pharmaceutics”

New dissolving and implantable microneedle patches have been created for a long-lasting, non-invasive delivery of the drug finasteride.

research Exogenous and endogenous lipids of human hair

21 citations , March 2017 in “Skin research and technology”

Removing external lipids from hair reduces moisture and increases strength, while removing internal lipids decreases water permeability.

research Photoageing of Hair Fiber and Photoprotection

18 citations , March 2009 in “Skin pharmacology and physiology”

Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.

research Health improvement of human hair and their reshaping using recombinant keratin K31

12 citations , October 2018 in “Biotechnology reports”

Recombinant keratin K31 makes damaged hair thicker, stronger, and straighter.

research New keratin isolates: actives for natural hair protection.

12 citations , October 2007 in “PubMed”

Keratin helps protect and strengthen hair, reducing damage and color fading.

research An Innovative Experimental Petrographic Study of Concrete Produced by Animal Bones and Human Hair Fibers

11 citations , July 2021 in “Sustainability”

Concrete made from animal bones and human hair is stronger and more environmentally friendly than traditional concrete.

research Photo‐protective effect of cuttlefish ink melanin on human hair

7 citations , September 2021 in “Journal of Applied Polymer Science”

Cuttlefish ink melanin protects hair from UV damage.

research Molecular elements of the regulatory control of keratin filament modulator AHF/trichohyalin in the hair follicle

7 citations , July 2008 in “Experimental Dermatology”

The study concluded that a protein important for hair strength is regulated by certain molecular processes and is affected by growth phases.

research Highly Conserved Keratin-Associated Protein 7-1 Gene in Yak, Taurine and Zebu Cattle

2 citations , January 2017 in “Folia biologica”

The KRTAP7-1 gene is very similar across different cattle and yak breeds and likely plays a role in hair strength and shape.

research Fermented grapeseed oil repairs chemically damaged hair via enhanced permeability mechanisms

July 2025 in “Scientific Reports”

Fermented grapeseed oil effectively repairs and protects chemically damaged hair.

research The Genomic Variation in Textured Hair: Implications in Developing a Holistic Hair Care Routine

October 2024 in “Cosmetics”

Afro-textured hair needs personalized care due to its unique genetic traits.

research Cryogelation of human hair keratins

January 2022

Human hair keratins can be turned into useful 3D biomedical scaffolds through a freeze-thaw process.

research Damage limitation: comparing the impact of polymers on bleached hair, when applied within or as post-bleach treatments

June 2017 in “University of the Arts London Research Online (University of the Arts London)”

Polymers help reduce damage and improve bleached hair when used during or after bleaching.

research 856 Topical application of newly developed pseudoceramide improved both skin and hair barrier functions

April 2017 in “Journal of Investigative Dermatology”

Applying pseudoceramide improved skin and hair health.

research Rational design of keratin-based injectable hydrogels for biomedical applications

January 2016 in “Frontiers in Bioengineering and Biotechnology”

Keratin-based hydrogels can be improved for medical use by adding PEG, making them more soluble and adjustable.

research Erosive pustular dermatosis of the scalp: A neutrophilic folliculitis within the spectrum of neutrophilic dermatoses

25 citations , October 2018 in “Journal of The American Academy of Dermatology”

Erosive pustular dermatosis of the scalp is a type of skin inflammation often confused with other conditions, requiring continuous treatment.

research Wear characteristics of epoxy based hybrid composites reinforced with short hair fibers and glass micro spheres

7 citations , January 2018 in “Materials Today: Proceedings”

Adding human hair fibers and glass micro-spheres to epoxy improves its wear resistance and strength.